Protractor



FIG. 1 is a perspective view of a protractor showing my design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a side elevational view thereof, the other side being identical;

FIG. 4 is a front end elevational view thereof;

FIG. 5 is a rear end elevational view thereof; and,

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a protractor, as shown and described. 